Bending corrugated material.



CHARLES E. Maenner ivrAivsrInLn; oHro:

` mimmo conanaarnnivrnrnnren.

a Speoicat'onmt Letters *Patenti Patented J-ule 4,1918. l

" Applicazibnnleaiuebruanyia, 1917." serial No. mana?,

To altlvwkomitmay concern;

Be it knownth 13111,; C

Richland and.. State of Ohio, haue invented certain new and useful`Improvements, in.` Bending CorrugatedI Material; ofgwhichk theyfollowing isa specification.

This invention: relates to bending, corragated.material. a i t a a Theprimary. object ofythsinvelltion isto bend corrugated material in sucha, manner;

as to`V form flanges thereonwithout subject# ing the materiaL to,excessive strain, stness,

stretching, unduefracture or weakening of' the, fibers of thematerial'..t i

Another object of thisv inventitant is l to t vide a` method; of?formmg`flanges integral;

with the, body, poitiouiof cor,rugatedtmate-v t rial. in. a mannenthauwill notpserously af,b feet the tensile strength., of. the imaterialv forming the flanges.`

Av further object; ofthis; intention to `forml flangeson` couru gatedlmat'erat having.; t a seriesl` ofL alternateA depressions, and ridges, t

' the t depressionsbeing, t formed concave` ,and

l lation. to the convex portion; lofthe corru.-

continuous. with, f but in, alined';` angular. t re-v` gated; material.`i i A. further object` toipnovide; means4 throughl themedium off flangesformed. om corrugated maternalto t connect t sections, of

culvert pipes thereby constructingba culvert pipe; off separate;sections; which efore being connected permit of being closely andsnugly.y packed together economiaing` in, star-vi t age space andpermitting the transportation..

of said sections closely and compactly packed together.

A further object consists in bending corrugated material at right anglesto the body portion without sub]ecting it to undue strain to permit theflanges to extend around and cover the corners of a rectangular buildingor the like, thereby obviating the use of an extra corner piece.

I attain these and other objects by the method of making andconstructing the article of manufacture, illustrated in the accompanyingdrawing, in which:-

Figure 1 is an exterior side view of two sections of corrugated materialformed to be used for culvert pipes and provided with integral flangesshowing same assembled reparatory to being fastened together by olts orthe like.

a nLEsEgMlaRunN a citizen of tlleUnited States of America,

residing. aty Mansii'eldgtV in. the` county, of

i of one oftheculfvert pipe sections showin I thev relation and formofthe `face ofthe Fig. 2 is a perspective view of Fig.A l showing `the aculvert `pipe` `sections nested', preparatory to shirliping,"`transporting or shipping: same t in compact form.

Fig',4 Bis a perspective view of Fig,.1 showing,a. portion, of theinterion: exterior and' one end of, the culvert pipe sections. a

Fig. l 1s an interior View ot a fragment flange withresp ect4 tocorrugations.4

Fig., 5 is. a; perspectivey view ofiV a convene tional rectangularstructure formedrof" sections of flangedV corrugatedl material,` show-`ingf'the method of using said material?` for covering structures of theform and type:

described` The drawings show corrugated material bent, in. such; a(manner as to provide integral flanges Vfor fastening sections of"thematerial together to provide culvert pipes andf the,

methodffofflusingthe sections of said mate,- rial for coveringrectangular structures or thelike.. i L

It will bef noted thatwhen the sectionsy are used. for t coveringl arectangular structure or thellikertleiflanged portions ofeach section aoverlap the unfi'anged` end" portions ofi7 the: next succeedingsections. at the corners ofthe structure.

1n. constructing the t corrugated material A to provide .culvert pipesections, as shown ini F 1g. ha .seines ofalternateconoave. portions 1and convex.t portions 2 are formed', as

shown. The corrugated material is then clampedfseomielv at` aIpre-,determined point sitiY esto leave a margin of the corrugatedmaterial extending beyond the clamping meansand in a position to be bentfreely in an angular relation to the body portion of the corrugatedmaterial which is held in a pre-determined position by the clampingmeans.

Pressure is exerted upon the margin of the corrugated material thatextends beyond the clamping means forming the angularly related flange Cas shown clearly in Fig. 4. In exerting pressure upon the margin of saidcorrugated material to form the flange, the pressure means or die isformed and arranged so as to form a flange on the corrugated materialhaving a series of alternate concave depressions and convex ridges.

The pressure means or die is shaped and designed to press against theconvex portion of the corrugated material and form a concave depressionin line but in angular relation to the convex portions of the corrugatedmaterial and a convex ridge in line but in angular relation to theconcave portions of the corrugated material, thereby forming a iiange inangular relation to the body portion of the corrugated material having aseries of convex ridges and con# cave depressions respectively on aplane With each other.

Attention is called to the fact that in ex# erting thepressure upon theconvex por tions of the corrugated material preparatory to and informing an integral angularly related flange upon the corrugatedmaterial With concave depressions in reverse relation, that unduestretching, straining and frac ture of the fibers of the corrugatedmaterial are substantially eliminated and kinking of the corrugatedmaterial prevented, as the excess or surplus material forming the convexportions of the body of the corrugated material follows the line ofleast resistance and forms a series of convex ridges on the flange inline but in opposed relation to the concave depressions of thecorrugated ma-` terial.

In bending corrugated material to pro?` vide a flange as described,unduestress and" strain of the material incident to bending corrugatedmaterial in the conventional manner vare eliminated.

In the operation described, the bending strain when a flange is beingformed on the corrugated material is equalized along the line indicatedby reference letter Dv and the tensile strength of the corrugatedmaterial is no more affected than in the case of bend-` ing iianges onplane material. Y

It will be noted that economy in space, storage capacity and convenienceand facility in shipping or transporting are accom; plished by makingculvert pipe in sections,

, .Fig. 2.

alternate ridges and depressions, consisting in 'bending the edge of thematerial to form aiiange and simultaneouslyforming such iiange toipresent alternate ridges andy depressions substantially similar to andVuni form With such formations in the material but of opposedregistryfvvherebyfeach ridge and each depression of the materialmerges'into a depression and a rid'gerespectively of theflange.

Q. The herein-described method of form-- ingflanges on corrugatedmaterial having alternate ridges'and depressions consisting in bendingthe edge of the material to form a iiange, forming the flange Withalternate ridges'and depressions merging intoand registering with thenon-similar formations ofthe material, the' line of merger lbetween Asuch formations of the material and flange constituting the line ofbend;

3. A lcorrugatedjstrip having ridges and depressions and an angular-lyrelated flange on one edge thereoffhaving substantially similar 'ridgesand depressions as the strip arrangedin exactbpposite-"order `to suchformations'of the strip, the lineof bend of the flange `constitutingplane of the material to avoid fracture.

In testimony Whereof'I aiiix my signature.

f E. MARTIN;

Copies of this patent may 'be obtained for five cents each,by addressingthe Gommissioner of Patents,

Washington, C. i y i p 4 the plane of least projection of thematerlalbeyondthe' normal

